| 100% | ENDOCRINE | 9 | Bodily system with adrenal and thyroid glands |
| 50% | IMMUNE | 6 | Bodily system with thymus, spleen and bone marrow |
| 44% | ENDOCRINE | 9 | System that deals with hormones and glands |
| 39% | GLANDS | 6 | Pituitary, adrenal and thyroid are examples |
| 39% | ENDOCRINE | 9 | Bodily system of glands |
| 37% | UNIX | 4 | System with "sleep" and "whoami" commands |
| 37% | DIGESTIVE | 9 | Bodily system including the stomach and intestines |
| 36% | SUNY | 4 | System with Binghamton and Buffalo campuses, for short |
| 35% | ZEROSUM | 7 | Like a system with equal gains and losses |
| 35% | SUNY | 4 | College system with campuses in Buffalo and Binghamton |
| 35% | WSU | 3 | Sch. system with campuses in Pullman and Spokane |
| 34% | METRIC | 6 | Measurement system with grams and liters |
| 34% | BASETWO | 7 | Number system with only 0's and 1's |
| 34% | IIT | 3 | University system with campuses in Hyderabad and Delhi (Abbr.) |
| 34% | RING | 4 | Home security system with a doorbell and a camera |
| 34% | YOGA | 4 | Exercise system with Bikram and hot varieties |
| 33% | SUNY | 4 | Sch. system with campuses in Albany and 63 other places |
| 33% | CALSTATE | 8 | Univ. system with SF and LA campuses |
| 32% | SLR | 3 | Camera with a mirror and prism system, briefly |
| 31% | BINARY | 6 | Two-number system with 0s and 1s |
| 30% | MORSE | 5 | ___ code (communication system with dots and dashes) |
| 30% | MORSE | 5 | ___ code (telecommunications system with dots and dashes) |
| 30% | MCAT | 4 | Exam with a "Chemical and Physical Foundations of Biological Systems" section |
| 30% | BINARYCODE | 10 | *System with only ones and zeros |
| 29% | MCAT | 4 | Exam with a BBLS (Biological and Biochemical Foundations of Living Systems) section |
| 28% | ECO | 3 | Prefix with "system" and "friendly" |
| 28% | ECO | 3 | Prefix with "system" and "logical" |
| 28% | WIFINETWORK | 11 | System with hotspots |
| 28% | SONAR | 5 | System with pings |
| 28% | METRIC | 6 | System with liters |